package com.springcloud.controller;

import com.springcloud.entities.CommonResult;
import com.springcloud.entities.Payment;
import com.springcloud.lb.LoadBalancer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;
import java.net.URI;
import java.util.List;

@RestController
@Slf4j
public class OrderController {

    @Resource
    private RestTemplate restTemplate;

    //下面这个是自己写的轮询的算法所在的类
//    @Resource
//    private LoadBalancer loadBalancer;

//    @Resource
//    private DiscoveryClient discoveryClient;

    //需要区分大小写
    public static final String PAYMENT_URL="http://CLOUD-PAYMENT-SERVICE";
    //下面的这种写法是原先的，只有一个服务的时候，可以这样写IP地址，直接写死
    //但是现在是服务的集群，不能写死了，这就需要用到EurekaServer中的服务注册名
    //因此就有了上方的更改
    //public static final String PAYMENT_URL="http://localhost:8001";

    @GetMapping("/consumer/payment/create")
    public CommonResult<Payment> create(Payment payment){
        return restTemplate.postForObject(PAYMENT_URL+"/payment/create",payment,CommonResult.class);
    }

    @GetMapping("/consumer/payment/get/{id}")
    public CommonResult<Payment> getPayment(@PathVariable("id") Long id){
        return restTemplate.getForObject(PAYMENT_URL+"/payment/get/"+id,CommonResult.class);
    }

    @GetMapping("/consumer/payment/getForEntity/{id}")
    public CommonResult<Payment> getPayment2(@PathVariable("id") Long id)
    {
        ResponseEntity<CommonResult> entity = restTemplate.getForEntity(PAYMENT_URL + "/payment/get/" + id, CommonResult.class);
        if (entity.getStatusCode().is2xxSuccessful()){
            return entity.getBody();
        }else {
            return new CommonResult<>(444,"操作失败");
        }
    }

//    @RequestMapping("/consumer/payment/lb")
//    public String getPaymentLB(){
//        List<ServiceInstance> instances=discoveryClient.getInstances("CLOUD-PAYMENT-SERVICE");
//        if (instances==null||instances.size()<=0){
//            return null;
//        }
//        ServiceInstance serviceInstance=loadBalancer.instances(instances);
//        URI uri = serviceInstance.getUri();
//        return restTemplate.getForObject(uri+"/payment/lb",String.class);
//    }


}
